Section 335.174 - Closure and Post-Closure Care (Landfills)(a) At final closure of the landfill or upon closure of any cell, the owner or operator must cover the landfill or cell with a final cover designed and constructed to: (1) provide long-term minimization of migration of liquids through the closed landfill;(2) function with minimum maintenance;(3) promote drainage and minimize erosion or abrasion of the cover;(4) accommodate settling and subsidence so that the cover's integrity is maintained; and(5) have a permeability less than or equal to the permeability of any bottom liner system or natural subsoils present.(b) After final closure, the owner or operator must comply with all post-closure requirements contained in 40 Code of Federal Regulations §§264.117-264.120, including maintenance and monitoring throughout the post-closure care period (specified in the permit under 40 Code of Federal Regulations §264.117). The owner or operator must:(1) maintain the integrity and effectiveness of the final cover, including making repairs to the cap as necessary to correct the effects of settling, subsidence, erosion, or other events;(2) continue to operate the leachate collection and removal system until leachate is no longer detected;(3) maintain and monitor the leak detection system in accordance with 40 CFR §264.301(c)(3)(iv) and (4) and § 264.303(c), and comply with all other applicable leak detection system requirements of this subchapter.(4) maintain and monitor the groundwater monitoring system and comply with all other applicable requirements of §§ 335.156-335.166 of this title (relating to Applicability of Groundwater Monitoring and Response; Required Programs; Groundwater Protection Standard; Hazardous Constituents; Concentration Limits; Point of Compliance; Compliance Period; General Groundwater Monitoring Requirements; Detection Monitoring Program; Compliance Monitoring Program; and Corrective Action Program);(5) prevent run-on and run-off from eroding or otherwise damaging the final cover; and(6) protect and maintain surveyed benchmarks used in complying with 40 Code of Federal Regulations §264.309.30 Tex. Admin. Code § 335.174
The provisions of this §335.174 adopted to be effective May 28, 1986, 11 TexReg 2347; amended to be effective February 26, 1996, 21 TexReg 1142.